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. 2019 Aug 15;29:32. doi: 10.1038/s41533-019-0144-8

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Mean PM_2.5 measurements in Uganda, Vietnam and Kyrgyzstan before and after cookstove/heater intervention. The mean PM_2.5 with 95% confidence interval; baseline measured before intervention, first post 2 months and second post 6 months (in Uganda and Vietnam) or 12 months (in Kyrgyzstan); p-value is measured between baseline and second post